Speaker
Anselm Vossen
Description
some points which I think wold be valuable to discuss
-The correct frame to extract azimuthal correlations in e+e-: The
theory is mostly worked out for back-to-back hadrons. However, for
experimental and theoretical reasons, two other methods are used: The
'thrust' method and lately modulations in jets. What are the
consequences for fits? E.g. are evolution effects different for jets?
Will it be possible to use measurements with two soft scales (as
thrust or jet method) in global fits?
-Extraction of the multidimensional dependence of fragmentation
functions: I saw that you plan to have an extensive discussion at of
this point. From the e+e- POV the question is probably which kinematic
region is in particular important for SIDIS, p+p. There is also a
specific IFF question about the importance to extract the different
partial wave contributions separately.
-Can we formulate observables that are sensitive to Twist3
fragmentation functions in e+e-? I am thinking here about the recently
proposed framework by Kanazawa, Koike, Metz and Pitonyak and the
twist3 FF that doesn't have a counterpart in the TMD framework. I
think it might be difficult to observe in e+e- but maybe worth a
discussion.
-We use double ratios to cancel acceptance effects and effects from
radiative gluons. The effects from radiative gluons are small in
simulation. How useful are complicated double ratios in global
analysis, e.g. for pi0 we use (pi0pi++pi0pi-)/(pi+p++pi-pi-)
| Session | 5: TMD fragmentation functions in e+e- and SIDIS processes |
|---|
Author
Anselm Vossen
